Sole trimming and channeling machine



Oct. 7, 1941. .c[ L. FLINDT- I 2,257,739

SOLE TRIMMING AND CHANNELING MACHINE Original Filed July 2a, 1936 Patented Oct. 7, 1941 i j. T TES PATENT-CO i 2.2573395! V i Y SOLE TRIMMING ANDCHANNELING" ApplicationJuly 23, 1936, Sefi'alNoi 92,170

. i l RenewedJanuarylfi; 1940,;

esta loll 12 1s')" This invention is useful for trimming the sole of a shoe preparatory to its introductionto the stitcher for sewing andis equally valuable for trimming up after the sewing has been done.

The combination of parts claimed herein are for attaching to an ordinary jig saw, scroll saw or a band saw; however, the first mentioned is my preference and the drawing :is especially made to show the application of the inventionto the jig-saw type. i The general object of this invention is to provide a machine for trimming up or rough rounding the soles of shoes for use in shoe factories and shoe repairshops, which is s'impler'and less expensive than the machines nowin 'use for this purpose, and has a more diversified use as a general utility machine than former machines; for it isuseful for trimming heels,'-cutting material from stockand shaping insoles. This ma chine also cuts a channel in the sole, when same is of leather, in which the stitch may be housed whenthe sole is sewed on. i In the claims attached hereto certain improvements are featured over my Patent N0; 2,051;333, filed June 29,1935, for Sole-trimming machines.

Fig. 1 is a front view of the essential parts of the machine. j e j Fig. 2 is a top view of the presser foot3 and its controlling parts when disconnected from the frame 22 of the jig-sawby loosening set screw 2|. Fig; 3 isafront view of a means-for creating a bend in the saw in order to make possible closer entry into the arch of the shoe in the trimming of the shank of the sole when the last is in the shoe.

The saw 2;passes through a slot in the work supporting plate 4 which fits it back of the teeth of the saw, permitting of the up and down move ment characteristic of the jig-saw and insuring accurate movement at-all times. 1

The said plate 4 is made of tool steel and'te'rnpered' to a very hard degree to insure that the said slot doesnot wear out of true fit to the saw blade. r I I The presser foot 3 is in one piece from its lowest point up to and including tube I8 and fits on rod [4 in movable relation thereto. This presser foot serves to hold the work anclprotect the upper of the shoe from possible injury from the teeth of the saw 2 which passes through a slot therein in movable relation thereto. Rod 14; fits into :a hole in part of the frame 22 of the-machine in which it istightenedby'set screw 2 L; Rod [4 has a sleeve 16 secured thereto which serves as a checkcontrolling the lowest position at which the said presser foot rests and where it is held by spring l1. i

In operation the operator grasps the gauge f l2 ancLlifts to permit entry of'the work under sawed. It will be notedin the drawing that the saidgauge 12 has different thicknesses in step form to make it, possible for the operators of the machine to lift the presser foot to that thickness he selects from the gauge which corresponds with the'thiekness of the material being sawed. This functions torelieve some of the pressure naturally augmented by compressing the spring sufiiciently to make the presser foot take the thicker soles and by this means easier feed of the work is maintained, for the presser foot cannot bear too hard on the work when the gauge 12 is properly adjusted.

136.1110 is part of the usual connection in a jigsaw to the driving, power and has two bolts, 1 and Q threaded' therein'between the ends of which one end of saw 2is clamped. The channel cutter'6 has ahole through the lower end thereof through-which bolt 1 passes and around this bolt-nuts 8 screw and clamp the channel cutter between'them in correct lateral position to bring the cuttingedg'e'of the channel cutter at the desired distance from the trimmed edge of the sole. The channel cutter penetrates the bottom of theksole" against the resistance of spring I! with each upward movement of the saw and the depth of the cut made is governed by the strength oftthe'press'ure exerted by spring I1; this spring can b compressed by turning down nut'20 on threaded sleeve 19 which is secured to rod l4, and when turned down causes the channel cutter to cutagainst greater resistance and accordingly a deeper channel is produced.

A When sawing asole to fit a welt on a shoe the operator holds the shoe with the edge of the welt against the left side of the presser foot, and the extreme lower point of the presser foot riding the work; in this way the thickness of the metal between the saw 2, Fig. 2, and the left edge of the presser foot indicates the amount of overhang the sole will have beyond the welt after 2 aesrpeo being trimmed. Some operators will prefer a sible injury caused by the cutting edge of the 7 larger ovehang than the drawing indicates and blade.

to provide for this contingency the presser foot 2. The combination in a sole trimming macan be turned clockwise on its axis rod I4, Fig. chine of means for supporting the sole of a shoe 2, sufliciently to move the opening 23 in the 5 while being trimmed, a blade for trimming the presser foot to contact with the saw 2 on its said sole having a sharpened edge; means suitright side and a consequent thicker gauge will ably mounting the blade to enable the sharpresult to govern the sole overhang. ened edge to be drawn against the said sole to The nut l5 at the lower end of rod serves trim -it,"meansfor holding the sole while being 7 when tightened to bind the guide H against 10 trimmed," means separating the sole from its sleeve it which is part of rod Min firm rela-. support intermittently thereby reducing the retion 'thereto and also adjusted relation con sistance present when the work is in continual trolling the lateral position of the preSSerffOOt' contact withits support, and rendering easier as just above explained, for the sides of the-1; the feeding of the sole against the edge of the to bend at this point and consequently allows greater'clearance above for the top portion of exerted by the presser foot is minimized to vsuch guide fit the presser foot horizontal section inl..15 b1ade because of the said intermittent raising,

movable relation thereto but preventingl'oosemeans contacting both sides of the said blade in ness and play nevertheless. Pivot; bo'lt' l3"-exr-; position -to guide it and promote accuracy of tends through a hole in guide II in movablBre-r 1 action and smoothness of result in the trim of lation thereto to permit of up and downmovethe sole, and means contacting the said blade ment. in position to cause an arching away of the As shown in the drawingith'e plate :4 which bladeiromzthe upp 0f the shoe S016 130 enable supports the work, slopes onp'on e side';at anzane thereby; clearance for that part of the blade gle; the object of this slope is to enable the passinggclose -to the upper of the shoe when 7 operator to incline the shoe when sawing; the the oper t r f t machine trims in t e c shank of theshoe sole inorder to gain clear zwiihfi i sa en bli m vement 0f the ance for thevupper connections to the saw-and b ade' tt 'W rK n Cutting. u upstill be able to out under sufii'ciently This ared F a pe ed by a Carrier moving rangement sufiices'for most work and especially u h t B KWith it. I

for repair shop use where the resoling is done eom in a S m awithout the use or lasts in the shoe which holds chine, means for supporting the sole Whfle bethe arch of the upper out into a prominent and t i a blade o trimming 1711650178 5 protruding position. To meet this diiiicult'y of bladelhaling r t thereindesigned to cut trimming soles in the arch or shank portion as Phesole andmemoye'therefrom Sawdust needed in manufacturing when the lasts are in mg 300ml thereby for the blade follow t the Shoes, I provide a bent Saw as Shown in out: without danger iofth-e blade binding on the Fig. 3. The pulley 24 around its axis, pivoted F mefinst forholdltlg the Work While to presser foot 3, has a rubber tire 25 which mg trimmedr-means for hfting the work from its contacts the saw 2 and causes it as it operates stlpportfmtermlttenuythereby f f the s1stance-present when the work is in continual 40 contact with its-support and rendering easier the arch held-out by the last in the sho The hand m of i il a the blade saw of course is held in proper tension by the usuatspflng Connections characteristicof sible injury by the blade and means for chana m l nelingithe work to create a groove therein for An outstanding feature and advantage of housing the stitch when the work is sewed. invention is the obviating ,ofjthe need for tme- 4v Thecombina'tion with a jig saw mechanism chamflal equipment a in existing of a flexible blade with a sharpened edge exmach nes which do rough rounding-bythe .use v tending, alongmna dg l th r fa suitable of chisels; th saw I use takes hold progressively mbmit gm li dyg thgblader a support for on account of the shape and set of the teeth to b bgifi 'nd tbi ta a Shoe l vwhfl thereof and the resistance that m ght. othergq j q ;m l against the Said wise be encountered due tothe .holdingpower 5 :m ni m f 1 means f g I support fittinggthe blade in loose fit relaanextent by the c sel bo tomco m ed 5 tion theretoto: insure accurate movement of of h Dresser foot, and the bumpm fi f the blade and a trim of the said sole at subunderneath exerted by the channel cutter, that stantially rig ht. angles t t tt of t the result in actual practice is that the'feeding sole when -thetoe and. ball portions thereof of the Wor s v y i y complished byhand are being trimmed, means obtaining clearance power. forthat part ct -the said blade passing the up- Having thus described my invention "what I per of the shoe when the-shank ofthe sole is claim as new and desire to secure by Letters Patbeing; trimmed-means contactingqthe said blade p1 a V i V Y @tifthQOPQOSitC side" of the-sole from the said 1-. The'combinationwitha jig saw mechanism, 9.supp r -.posit n t as n controlling of a blade witha sharpened edge extending along the blade to insure accurate action thereof vat one edge of its length,. means for attaching one all times, m a s governing the amount of overend of the said blade to the 'saidmechanism, ha g h i have; n u means for supporting the, sole-of'a shoe'posigg s r a 9 of different thi'cknessin tioned to enable thesaid edge'of the bladeeto be O j light pr ss e relationship as desired 7 drawn against theedge of the said sole and' there y -th e operator -t0- assi111h01ding e o by trim the same, means for holding the said sole w iletrimming same.- 7

on its support, means intermittentlyjift-ing the 5 The combination in a sole trimming ma sole from its support to enable easier hand feed chine, O a supp r fora shoe $0 a b ade. With ing of the workagainst the said blade, and means a harp ned' e ge n'ex endine alon n dge of ior-protecting the upper of the shoeyfrompon 7i a l' hwftq e gagement with the said sole cause of the said intermittent raising, means for protecting the upper of the shoe from pos- V to trim same, a device for holding the said sole on its support while trimming it, gauging means obtaining holding pressure on the sole in firm or loose relationship as desired by the operator of the machine while trimming, means parallel with the blade and extending as high as the arch of the shoe for protecting from possible injury by the blade that part of the shoe upper held out prominently by the protruding part of the last in the arch when the operator trims the closely cut shank portion of the sole, a device contacting the blade to guide same permanently located adjacent the work on the supported side thereof, another blade guide device located adjacent the opposite side of the work from the supported side and together with the first mentioned guide obtaining accurate movement of the naked blade through the work, and means for gaining clearance for that part of the blade passing the arch of the shoe when the shank thereof is being trimmed.

6. The combination in a sole trimming machine, of a unit designed to vibrate a cutter up and down, means for supporting the sole of a shoe while being trimmed, a blade secured to the said unit for cutting the sole as the unit moves downward, a channel cutter attached to the said unit for creating a channel in the work as the unit moves upward, and means for protecting the upper of the shoe from possible accidental injury from the cutting edge of the 7 blade.

7. The combination in a sole trimming ma chine, of a unit designed to vibrate a cutter, means for supporting the sole of a shoe while being trimmed, a blade attached to the said unit for cutting the said sole as the unit vibrates, a channel cutter attached to the said unit for creating a channel in the sole of the shoe as the unit vibrates, and means for protecting the upper of the shoe from possible accidental injury from the blade as it operates.

8. The combination with a jig saw mechanism, of a blade with a sharpened edge extending along one edge of its length, means assisting in attaching one end of the blade to the said mechanism, means assisting in supporting the work, means for holding the work on its support posi-, tioned to enable the operator to feed the work against the sharp edge of the blade to trim the same, and means for intermittently separating the work from its support to thereby reduce the resistance present when the work is in continual contact with its support and render easier the feeding of the work and means obtaining protection for the upper of the shoe from possible injury by the blade when the operator trims the shank of the sole.

CHARLES L. FLINDT. 

